Speculative Execution Vulnerabilities
The cluster centers on security risks of CPU speculative execution, particularly Spectre and Meltdown exploits, debating if it's inherently insecure, possible mitigations, and real-world attacks.
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How is speculative execution inherently insecure?
Spectre relies on tricking the CPU into branch predicting its way into accessing protected memory, no? Is it not possible that we can keep most of the performance benefits of speculative execution by somehow having a built in "Hey, never ever speculate that I'll want to access this region of memory" sort of thing?
Is it even possible to have speculative execution and not being vulnerable to related exploits?
Aren't AMD processors (and virtually every processor with speculative execution) vulnerable to Spectre?
Has there ever been a practical speculative execution attack found in the wild?
Does it have speculative execution vulnerabilities?
Speculation attacks enables code running on the machine to access data it shouldn't. I don't see how that relates to your scenario.
Is that out of concern for speculative execution security issues a la spectre & meltdown?
Apparently potentially: Red Hat Security statement https://access.redhat.com/security/vulnerabilities/speculati...
Speculative execution is not fixed in modern CPUs? Or this is related to old ones?_